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Study of the Chromonic Liquid-Crystalline Phases of bis-(N,N-diethylaminoethyl)perylene-3,4,9,10-tetracarboxylic Diimide Dihydrochloride by Polarized Optical Microscopy and 2H NMR Spectroscopy

Study of the Chromonic Liquid-Crystalline Phases of bis-(N,N-diethylaminoethyl)perylene-3,4,9,10-tetracarboxylic Diimide Dihydrochloride by Polarized Optical Microscopy and 2H NMR Spectroscopy

Suk-Wah Tam-Chang, Isaac K Iverson, Jennifer Helbley

Langmuir. 2004 Jan 20;20(2):342-7.

PMID: 15743076

Abstract:

The chromonic liquid-crystalline properties of bis-(N,N-diethylaminoethyl)perylene-3,4,9,10-tetracarboxylic diimide dihydrochloride in an aqueous solution were investigated by polarized light microscopy and 2H NMR spectroscopy. Both techniques indicate a narrow I + N biphasic region and a broad N phase region at concentrations ranging from approximately 6.9 to approximately 30 wt % at room temperature. Optical microscopy indicates that a hexagonal M phase exists at higher concentrations. The variation of the I --> N + I and N + I --> N transition temperatures with concentration was studied by 2H NMR spectroscopy. Finally, the effects of temperature and concentration on the order parameter of the N phase were investigated by 2H NMR using a tetra-deuterated derivative. A value of 0.97 was obtained for the N phase at its upper concentration limit.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP95689922	N,N′-Ditridecylperylene-3,4,9,10-tetracarboxylic diimide		95689-92-2	Price

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